U.S. federal trademark · Serial No. 72232415 · Reg. No. 0821531
COMPLETELY SOLID STATE (USING SILICON CONTROLLED RECTIFIERS) ELECTRONIC CONTROL UNIT PROVIDING STEPLESS PROPORTIONAL POWER CONTROL, DELIVERING A LARGE POWER OUTPUT FROM A MICROVOLT INPUT CONTROL SIGNAL AND USED TO CONTROL POWER TO MELTING FURNACES, ELECTRIC BOILERS, AND SPACE HEATERS
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